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DOUGHERTY & GEREBKE.

Joe-Cream Freezer.

No 66.685. Patented July 16, 1867.

Witnesses= inventon AM. PHOTO-LITHQCQNX. (OSBORNE'S PROCESS.)

JOSHUA DOUGHERTY AND F. W. GEREGKE, OFNEWBURG, N EW YORK.

Letters Patent No. 66,685, dated July lil, 1867.

IGE-GREAM FREEZER.

TO ALL WHOM IT MAY CONCERN:

Be it known that we, JOSHUA W. DOUGHERTY and F. W. GERECKE, of Newburg,in the county of Orange, and State ofNew York, have invented a new anduseful Improvement on Ice-Cream Freezers; and we do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompany ing drawing, and to the letters of referencemarked thereon. l

The nature of our invention consists in using a centre freezer inconnection"and combination with the heaters, which are used for stirringthe cream and scraping it oiffrom the walls of the vessel when itis'exposed to the efi'ect of the coldmii zture of ice and salt formaking ice-cream. This centre freezer is a hollow cylin dri'cal vessel,madeof tin, copper,;or any other suitable material, to receive aquantity of ice and salt, or any other eoolingmixture, for the purposeof freezing the cream from the centre, although when being exposed tothe effect of a cooling mixture from outside. This centre freezer, beingput in the centre body of the cream, removes. this centrepart of thecream, which is always badly stirred by the rotating motion of theheaters, and freezes the cream in less time thanifiit is only cooledfrom outside. In the accompanying drawing Figure 1 represents a sideview and a vertical section of an ice-cream machine. v

Figure 2, a section of thecentrefreezcr in larger scale.

I AA are a wooden tub, for the reception of the cold mixtureof ice andsalt. On thciinsicle bottom is fastened in the centre a step, A, for theend ofa oentre-pin on the bottom of the ice-cream vessel B 13 to keepthe vessel 13 in its place when being turned. 13 B are the cylindricalvessel for the reception of the cream when fully prepared for freezing.D D are a cast-iron cover closing the top of vessel B, and fitting, witha slot cut in its side, over a hub, at, on the vessel 13, so that when aturning motion is given to'the cover D, it .will turn the vessel 13also. Tbist'urning motion is given to it by a set of bevel-wheels. Oneof them, E, is cast on the cover or fastened to a longsleeve on thebower. The second wheel, G, is the driving-wheel; the third one, F, -isfastened to a shaft, S, going through the sleeveof the cover, and towhich are faste'ned the heaters of the machine. A wooden or cast-ironframe, H H, with shaft/H wheel W, crank Y, and handle Y, are used tocomplete a machine for turning the driving-wheel G by' hand or by otherpower. The shaft S, to which are fasten ed the beater-arms", is cut offa' shortdistance below the upper arm U, and a centre-pin, S, turned onits end. The arm U is fastened'to the shaftv by a screw on the shaft,and. held in its place by two jain-nuts N and N The lower arm U'Z-is notfastcnedto the shafts, but isfree, having a hole in its c'entrothrough'which passes-a pin, Z; fig. 2, loose, and around which pin Z thearm is allowed to revolve. A washer, 6 b, and a nut, a, support it frombelow. The upper arm U and the lower arm U areiirmlyconnectcd byvertical rod s'or heaters T T T T, which are again connected by smallhorizontal heaters 15 t A cylindrical vessel, C,'has in -its'centre ontop a step, R, to receive the pin S of the shaft S, and on its bottom apin, Z 'Z d, fastened by a plate, a a.

The lower end d is square, and fits in a square step, M, on the insidebottom of the main cream vessel B. Thisend dis made square on account ofmaking this cylinder C revolve with the vessel B when set in motion bythowhcel E, and the cylinder 0 is kept in its place by those two pointsS on top and (Z on bottom. By the third wheel Fa motion in an oppositedirection is'given to the shaft S and to the boaters T T, and in thisway a most etfectivc co o ling surface is given to the cream. "hewholeapparatus is held firm in its position while being turned by a centreset-screw, K, going through a hub, T, eonnccted'with a franie, II If,and a step,lA, in the inside bottom of the wooden tub A A. The cylinderC has an opening or a man-hole, O, of a suitable size, as-near to thetopas possible, to be shuttight by'a screw, 0, for the use of putting thecold mixture of ice and salt in the cylinder, and for removing the waterwhen the whole beating apparatus is taken out for putting a new quantityof cream in the vessel 13 for freezing. The cylinder 0 can be filled andemptied without being taken out of connection with the beater.

In small ice-cream machines, where the outside vessel B is onlystationary in a tub filled with ice, and the boaters revolved'by hand,the bottom step M is to be square, and the pin d on the cylinder Csqi'iurc-also, to leavothe'ccntre freezer stationary, so that the creamfreezing on the sides of the cylinder C'can be scrapednfi' by therevolving vertical boaters T T 7 What we claim as our invention, anddesire to secure by Letters Patent, is-

The cylindrical centre freezer C, with the man-hole 0, upper centre stepR, centre-pin (I, on bottom, in combination with the beater-arms U U andthe outer crenm-vcsscl B B by the square step M, substantially and forthe purpose as specified. ,1

' J. W. DOUGHERTY,

F. W. GEREOKE.

Witnesses Jim. 0; Non, Jenn l3. Kenn.

